Carbureter.



F. BAVBRBY.

GARBUBBTER.

APPLICATION FILED FEB. 24. 1913 Patented June 9, 1914 UNITED; STATES PATENT OFFICE.

FRANCOIS BAVEREY, OF LYON, FRANCE, ASSIGNOR T0 SOCIE'IE DU CARBUBATEUR ZENITH, OF LYON, FRANCE, A CORPORATION OF FRANCE.

CARBUBETER.

Specification ofIietters, Patent.

Patented J une 9, 1914.

Application filed February 24, 1913. Serial No. 750,250.

' To all whom it may concern:

Be it known that I, FRANgoIs BAVEREY,'

declare the following to be a full, clear, and

exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in and relating to internal combustion engines of the kind having two carburetors one for heavy fuel and the other for light fuel. According to the present invention the two carbureters operate automatically by means of a compensating outlet controlled bythe operation of the engine so as to supply the latter with lightfuel during slow running and a diminishing proportion of light fuel and an increasing proportion of heavy fuel as the speed of the engine increases. This result is obtained by the combination of two carbureters, one of ordinary construction adapted to furnish for each cylinder charge a larger quantity of heavy fuel in proportion as the suction increases; the other carbureter is of the type illustrated in my prior Patent, No. 907,953, issued December 29, 1908, and commonly known as the Zenith type and furnishes a constant" quantity of light fuel in a unit of time, so that the quantity of light fuel supplied will be smaller in proportion as the numberof strokes of the engme is greater. Accordingly, an engme thus constructed automatically substitutes to an increasing extent, in proportion as the engine consumes more fuel, a heavy and economical oil for a light and costly fuel. The economy thus obtained is partlcularly important for the well defined class of carburetors to which the invention is applicable.

The invention is illustrated in the accompanying drawing which represents a carbureter of the well-known Zenith type to which the invention has been applied.

The carburetor shown in the drawing comprises two jets supplied with two different liquids. From a constant level reservoir 1, the inner jet 3 of the injector 14 1S suppl ed in the ordinary conditions through the pipe 2. This jet opens to the center of the suction'conduit 4 beneath the throttling elements 5; air is supplied to the conduit-4 through an opening 6. The stronger the suction, the more fuel is supplied by the inner.

et 3, that is tosay, in proportion as the speed of the engine is greater. In accord ance w1th the invention it is this jet that is suppl edwith heavy cheap fuel and the reservior 1 is therefore charged with such fuel. A second reservoir 7, charged with light fuel supplies a conduit 9 open to .the atmosphere." This pipe supplies two jets, one of which 0 erates constantly and the other intermlttently.

D A pipe 8 enters the conduit 9 and opens into the suction conduit tin proximity to the edge of the throttle valve 5. The conduit. 9 also communicates through the conduit 12, with the outer annular jet 13 of the injector 14. The conduit 9 draws from the reservoir 7 a quantity of fuel which does not increase with the speed of the engine, 11. 6., the carbureter supplies a constant quantity of fuel in a unit of time. When the valve 5 is open and the engine running, this constant quantity of fuel is in a diminishing ratio for each cylinder charge in proportion as the speed increases, while the jet 3, on the contrary furnishes for each cylinder charge a larger quantity of fuel in proportion as the suction increases. This distribution is produced antomatically by the engine according to its speed. As its total consumption increases, it consumes so much the more heavy fuel and so much the less light fuel. The pi e 8 which does not descend to the bottom 0 the pipe 9, acts only on starting and at low speeds. 7

What I claim is 1. A carburetor for internal combustion engines, comprising an air conduit, a reservoir for heavy fuel means to supply said heavy fuel to the air conduit in quantities increasing with the speedof the engine, a light fuel reservoir, and means to deliver during normal running a constant quantity of the light fuel to the air conduit in a given period of time.

2. A carburetor for internal combustion engines, comprising an air cmduit, a reservoir for heavy fuel, a delivery nozzle adapted to supply fuel to the air conduit in quantities increasing with the speed of the engine, a light fuel reservoir, and means to deliver during normal running a'constant quantity ofthe light fuel to the air conduit in a given period of time so that as the speed of the engine increases the proportion of light .fuel in each charge becomes less and fuel in each charge becomes greater as the the proportion of heavy :fiiel becomes speed increases and the proportion of light greater. fuel becomes less. '3. In a'carbureter for internal combustion In testimony whereof I aflix my signature, 6 engines, the combination of means to Suppl in presence of two witnesses.

v a quantity of heavy fuel increasing wit 1 the speed of theengine, and means to supply v FRANQOIS BAVEREY during normalrunning a constant quantity Witnesses:

of light fuel independently of the s eed of MAURICE Prom,

10 the engine whereby the proportion 0 heavy MARIUS MERMAZ. 

